Inspection Procedure 3: The windshield wipers do not stop at the specified position.
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Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.
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COMMENTS ON TROUBLE SYMPTOM
The windshield wiper motor or the ETACS-ECU may be defective.
PROBABLE CAUSES
- Malfunction of the windshield wiper motor
- Malfunction of the ETACS-ECU
- Damaged harness wires and connectors
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STEP 1. M.U.T.-III data list
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Check the ETACS-related data list (Refer to GROUP 54A - ETACS, Service Data Reference Table  )
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- Set the ignition switch to the ACC position.
- Activate the windshield wipers.
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Item No.
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Item name
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Normal conditions
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25
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Fr wiper automatic stop switch
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Turns ON when the wipers are activated from the stopped state.
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OK: Normal condition is displayed.
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Q.
Is the check result normal?
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 Go to Step 6.
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 Go to Step 2.
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STEP 2. Check the windshield wiper motor.
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Check that the windshield wiper motor works normally (Refer to ).
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Q.
Is the check result normal?
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Go to Step 3.
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Replace the windshield wiper motor and wiper link assembly (Refer to ).
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STEP 3. Measure the voltage at windshield wiper motor connector terminal where ignition switch (ACC) is connected.
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(1)Disconnect the connector, and measure the voltage at the wiring harness side.
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(2)Set the ignition switch to the ACC position.
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(3)Measure the voltage between the windshield wiper motor connector terminal where ignition switch (ACC) is connected and the body earth.
OK: System voltage
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Q.
Is the check result normal?
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Go to Step 5.
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Go to Step 4.
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STEP 4. Check of open, short circuit in power supply line between windshield wiper motor connector and ignition switch (ACC).
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Q.
Is the check result normal?
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The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
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Repair the connector(s) or wiring harness
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STEP 5. Check of open, short circuit in F/WIP-AS line between windshield wiper motor connector and ETACS-ECU connector.
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Q.
Is the check result normal?
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Go to Step 6.
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Repair the connector(s) or wiring harness
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Check that the windshield wipers stop at the specified park position.
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Q.
Is the check result normal?
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The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
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Replace the ETACS-ECU (Refer to GROUP 54A - ETACS, ETACS-ECU ).
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